Hi, the best climbers I've ever had are Clematis Montana 'Mile-a-Minute', it's does what it say's on the box, very rapid growth, full of pink flowers and makes a wonderful screen on trellis, up old trees, over sheds etc. My other favourite is Jasmin, very fast growth once it's coming to the end of it's flowering, fast spreading and the scent is intoxicating! As for a hedge covering I would go for Laurel, just 'borrow' a few woody cuttings and stick them in some rooting powder and pop them into the soil where you want them to grow. Plant 2 next to each other at a time in case 1 fails. This can be left to grow as a dense tree then cut away all the branches from the bow to head height and just leave it to form a mushroom or clip it to form a barrier hedge. It's an evergreen, very hardy, you can hack at it and it comes back and is fast growing, but be careful if you burn the cuttings, they catch fire with a whoosh! My last choice for a hedge would be Forsythia, flowers yellow 1st in Spring then all the new growth happens ready to flower the following year. Once it's happy it can throw up branches in excess of 2ft growth per year! If you keep taking the tops off it will form a very dense hedge in no time at all. Hope this is of help to you